| /** |
| * _s.prune: a more elegant version of truncate |
| * prune extra chars, never leaving a half-chopped word. |
| * @author github.com/rwz |
| */ |
| var makeString = require('./helper/makeString'); |
| var rtrim = require('./rtrim'); |
| |
| module.exports = function prune(str, length, pruneStr) { |
| str = makeString(str); |
| length = ~~length; |
| pruneStr = pruneStr != null ? String(pruneStr) : '...'; |
| |
| if (str.length <= length) return str; |
| |
| var tmpl = function(c) { |
| return c.toUpperCase() !== c.toLowerCase() ? 'A' : ' '; |
| }, |
| template = str.slice(0, length + 1).replace(/.(?=\W*\w*$)/g, tmpl); // 'Hello, world' -> 'HellAA AAAAA' |
| |
| if (template.slice(template.length - 2).match(/\w\w/)) |
| template = template.replace(/\s*\S+$/, ''); |
| else |
| template = rtrim(template.slice(0, template.length - 1)); |
| |
| return (template + pruneStr).length > str.length ? str : str.slice(0, template.length) + pruneStr; |
| }; |